Nonstoichiometry, Defect Chemistry and Oxygen Transport in Fe-Doped Layered Double Perovskite Cobaltite PrBaCo2−xFexO6−δ (x = 0–0.6) Membrane Materials

Autor:	Ivan L. Ivanov, Petr O. Zakiryanov, Vladimir V. Sereda, Maxim O. Mazurin, Dmitry A. Malyshkin, Andrey Yu. Zuev, Dmitry S. Tsvetkov
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	point defects chemical diffusion self-diffusion surface exchange activation energy defect chemistry Chemical technology TP1-1185 Chemical engineering TP155-156
Zdroj:	Membranes, Vol 12, Iss 12, p 1200 (2022)
Druh dokumentu:	article
ISSN:	2077-0375
DOI:	10.3390/membranes12121200
Popis:	Mixed conducting cobaltites PrBaCo2−xFexO6−δ (x = 0–0.6) with a double perovskite structure are promising materials for ceramic semi-permeable membranes for oxygen separation and purification due to their fast oxygen exchange and diffusion capability. Here, we report the results of the detailed study of an interplay between the defect chemistry, oxygen nonstoichiometry and oxygen transport in these materials as a function of iron doping. We show that doping leads to a systematic variation of both the thermodynamics of defect formation reactions and oxygen transport properties. Thus, iron doping can be used to optimize the performance of mixed conducting oxygen-permeable double perovskite membrane materials.
Databáze:	Directory of Open Access Journals
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